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PRESENTED BY
CHIKKU JOSE
Department of Electronics Engineering
chikkujose1989@gmail.com
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
 AC bridge
 DC bridge
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
Wheatstone bridge
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
Self- Inductance
 Maxwell’s Bridge
◦ Maxwell inductance bridge
◦ Maxwell inductance capacitance
bridge
 Hay’s Bridge
 Anderson bridge
 Owen’s Bridge
Capacitance
 De Saulty Bridge
 Schering’s bridge
Mutual Inductance
 Carey foster;
Heydweiller bridge
Frequency
 Wien’s Bridge
Four arm bridge – AC bridge
Inductance and capacitance can be measured
Galvanometer is replaced by Vibration Galvanometer
Maxwell inductance bridge
Used to measure inductance
◦ By comparison either with a standard variable self inductance.
Maxwell inductance capacitance bridge
Used to measure inductance
◦ By comparison either with a standard variable capacitance.
Advantages
1) The balance equation is independent of frequency.
2) The two balance equations are independent ; if we choose R4 and
C4 as variable elements.
3) The bridge yields simple expression for unknown L1 and R1 in
terms of known elements.
4) It is useful for measurement of wide range of inductance at power
and audio frequencies.
Disadvantages
 Variable standard capacitor will be expensive
 It cannot be used for measurement of high Q values, it is limited to
measure low Q value (1<Q<10)
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges
ac dc bridges

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ac dc bridges

  • 1. PRESENTED BY CHIKKU JOSE Department of Electronics Engineering chikkujose1989@gmail.com
  • 13.  AC bridge  DC bridge
  • 32. Self- Inductance  Maxwell’s Bridge ◦ Maxwell inductance bridge ◦ Maxwell inductance capacitance bridge  Hay’s Bridge  Anderson bridge  Owen’s Bridge Capacitance  De Saulty Bridge  Schering’s bridge Mutual Inductance  Carey foster; Heydweiller bridge Frequency  Wien’s Bridge
  • 33. Four arm bridge – AC bridge Inductance and capacitance can be measured Galvanometer is replaced by Vibration Galvanometer
  • 34. Maxwell inductance bridge Used to measure inductance ◦ By comparison either with a standard variable self inductance. Maxwell inductance capacitance bridge Used to measure inductance ◦ By comparison either with a standard variable capacitance.
  • 35. Advantages 1) The balance equation is independent of frequency. 2) The two balance equations are independent ; if we choose R4 and C4 as variable elements. 3) The bridge yields simple expression for unknown L1 and R1 in terms of known elements. 4) It is useful for measurement of wide range of inductance at power and audio frequencies.
  • 36. Disadvantages  Variable standard capacitor will be expensive  It cannot be used for measurement of high Q values, it is limited to measure low Q value (1<Q<10)